To provide a hair iron which is convenient for use and can improve a health condition of hair.

This hair iron 1 is equipped with a pair of arm parts 10, 11 mutually connected rotatably at each one end on which heating parts 12, 13 are respectively equipped. An ion generating means to generate minus ions, an ozone generating means to generate ozone, and a power source circuit to supply power to the ion generating means and the ozone generating means are also equipped on the hair iron. A protruded part 10 with a hollow inside is formed on almost the center of one arm part.